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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 | /* * An implementation of key value pair (KVP) functionality for Linux. * * * Copyright (C) 2010, Novell, Inc. * Author : K. Y. Srinivasan <ksrinivasan@novell.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/net.h> #include <linux/nls.h> #include <linux/connector.h> #include <linux/workqueue.h> #include <linux/hyperv.h> #include "hyperv_vmbus.h" #include "hv_utils_transport.h" /* * Pre win8 version numbers used in ws2008 and ws 2008 r2 (win7) */ #define WS2008_SRV_MAJOR 1 #define WS2008_SRV_MINOR 0 #define WS2008_SRV_VERSION (WS2008_SRV_MAJOR << 16 | WS2008_SRV_MINOR) #define WIN7_SRV_MAJOR 3 #define WIN7_SRV_MINOR 0 #define WIN7_SRV_VERSION (WIN7_SRV_MAJOR << 16 | WIN7_SRV_MINOR) #define WIN8_SRV_MAJOR 4 #define WIN8_SRV_MINOR 0 #define WIN8_SRV_VERSION (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR) #define KVP_VER_COUNT 3 static const int kvp_versions[] = { WIN8_SRV_VERSION, WIN7_SRV_VERSION, WS2008_SRV_VERSION }; #define FW_VER_COUNT 2 static const int fw_versions[] = { UTIL_FW_VERSION, UTIL_WS2K8_FW_VERSION }; /* * Global state maintained for transaction that is being processed. For a class * of integration services, including the "KVP service", the specified protocol * is a "request/response" protocol which means that there can only be single * outstanding transaction from the host at any given point in time. We use * this to simplify memory management in this driver - we cache and process * only one message at a time. * * While the request/response protocol is guaranteed by the host, we further * ensure this by serializing packet processing in this driver - we do not * read additional packets from the VMBUS until the current packet is fully * handled. */ static struct { int state; /* hvutil_device_state */ int recv_len; /* number of bytes received. */ struct hv_kvp_msg *kvp_msg; /* current message */ struct vmbus_channel *recv_channel; /* chn we got the request */ u64 recv_req_id; /* request ID. */ } kvp_transaction; /* * This state maintains the version number registered by the daemon. */ static int dm_reg_value; static void kvp_send_key(struct work_struct *dummy); static void kvp_respond_to_host(struct hv_kvp_msg *msg, int error); static void kvp_timeout_func(struct work_struct *dummy); static void kvp_host_handshake_func(struct work_struct *dummy); static void kvp_register(int); static DECLARE_DELAYED_WORK(kvp_timeout_work, kvp_timeout_func); static DECLARE_DELAYED_WORK(kvp_host_handshake_work, kvp_host_handshake_func); static DECLARE_WORK(kvp_sendkey_work, kvp_send_key); static const char kvp_devname[] = "vmbus/hv_kvp"; static u8 *recv_buffer; static struct hvutil_transport *hvt; /* * Register the kernel component with the user-level daemon. * As part of this registration, pass the LIC version number. * This number has no meaning, it satisfies the registration protocol. */ #define HV_DRV_VERSION "3.1" static void kvp_poll_wrapper(void *channel) { /* Transaction is finished, reset the state here to avoid races. */ kvp_transaction.state = HVUTIL_READY; tasklet_schedule(&((struct vmbus_channel *)channel)->callback_event); } static void kvp_register_done(void) { /* * If we're still negotiating with the host cancel the timeout * work to not poll the channel twice. */ pr_debug("KVP: userspace daemon registered\n"); cancel_delayed_work_sync(&kvp_host_handshake_work); hv_poll_channel(kvp_transaction.recv_channel, kvp_poll_wrapper); } static void kvp_register(int reg_value) { struct hv_kvp_msg *kvp_msg; char *version; kvp_msg = kzalloc(sizeof(*kvp_msg), GFP_KERNEL); if (kvp_msg) { version = kvp_msg->body.kvp_register.version; kvp_msg->kvp_hdr.operation = reg_value; strcpy(version, HV_DRV_VERSION); hvutil_transport_send(hvt, kvp_msg, sizeof(*kvp_msg), kvp_register_done); kfree(kvp_msg); } } static void kvp_timeout_func(struct work_struct *dummy) { /* * If the timer fires, the user-mode component has not responded; * process the pending transaction. */ kvp_respond_to_host(NULL, HV_E_FAIL); hv_poll_channel(kvp_transaction.recv_channel, kvp_poll_wrapper); } static void kvp_host_handshake_func(struct work_struct *dummy) { tasklet_schedule(&kvp_transaction.recv_channel->callback_event); } static int kvp_handle_handshake(struct hv_kvp_msg *msg) { switch (msg->kvp_hdr.operation) { case KVP_OP_REGISTER: dm_reg_value = KVP_OP_REGISTER; pr_info("KVP: IP injection functionality not available\n"); pr_info("KVP: Upgrade the KVP daemon\n"); break; case KVP_OP_REGISTER1: dm_reg_value = KVP_OP_REGISTER1; break; default: pr_info("KVP: incompatible daemon\n"); pr_info("KVP: KVP version: %d, Daemon version: %d\n", KVP_OP_REGISTER1, msg->kvp_hdr.operation); return -EINVAL; } /* * We have a compatible daemon; complete the handshake. */ pr_debug("KVP: userspace daemon ver. %d connected\n", msg->kvp_hdr.operation); kvp_register(dm_reg_value); return 0; } /* * Callback when data is received from user mode. */ static int kvp_on_msg(void *msg, int len) { struct hv_kvp_msg *message = (struct hv_kvp_msg *)msg; struct hv_kvp_msg_enumerate *data; int error = 0; if (len < sizeof(*message)) return -EINVAL; /* * If we are negotiating the version information * with the daemon; handle that first. */ if (kvp_transaction.state < HVUTIL_READY) { return kvp_handle_handshake(message); } /* We didn't send anything to userspace so the reply is spurious */ if (kvp_transaction.state < HVUTIL_USERSPACE_REQ) return -EINVAL; kvp_transaction.state = HVUTIL_USERSPACE_RECV; /* * Based on the version of the daemon, we propagate errors from the * daemon differently. */ data = &message->body.kvp_enum_data; switch (dm_reg_value) { case KVP_OP_REGISTER: /* * Null string is used to pass back error condition. */ if (data->data.key[0] == 0) error = HV_S_CONT; break; case KVP_OP_REGISTER1: /* * We use the message header information from * the user level daemon to transmit errors. */ error = message->error; break; } /* * Complete the transaction by forwarding the key value * to the host. But first, cancel the timeout. */ if (cancel_delayed_work_sync(&kvp_timeout_work)) { kvp_respond_to_host(message, error); hv_poll_channel(kvp_transaction.recv_channel, kvp_poll_wrapper); } return 0; } static int process_ob_ipinfo(void *in_msg, void *out_msg, int op) { struct hv_kvp_msg *in = in_msg; struct hv_kvp_ip_msg *out = out_msg; int len; switch (op) { case KVP_OP_GET_IP_INFO: /* * Transform all parameters into utf16 encoding. */ len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.ip_addr, strlen((char *)in->body.kvp_ip_val.ip_addr), UTF16_HOST_ENDIAN, (wchar_t *)out->kvp_ip_val.ip_addr, MAX_IP_ADDR_SIZE); if (len < 0) return len; len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.sub_net, strlen((char *)in->body.kvp_ip_val.sub_net), UTF16_HOST_ENDIAN, (wchar_t *)out->kvp_ip_val.sub_net, MAX_IP_ADDR_SIZE); if (len < 0) return len; len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.gate_way, strlen((char *)in->body.kvp_ip_val.gate_way), UTF16_HOST_ENDIAN, (wchar_t *)out->kvp_ip_val.gate_way, MAX_GATEWAY_SIZE); if (len < 0) return len; len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.dns_addr, strlen((char *)in->body.kvp_ip_val.dns_addr), UTF16_HOST_ENDIAN, (wchar_t *)out->kvp_ip_val.dns_addr, MAX_IP_ADDR_SIZE); if (len < 0) return len; len = utf8s_to_utf16s((char *)in->body.kvp_ip_val.adapter_id, strlen((char *)in->body.kvp_ip_val.adapter_id), UTF16_HOST_ENDIAN, (wchar_t *)out->kvp_ip_val.adapter_id, MAX_IP_ADDR_SIZE); if (len < 0) return len; out->kvp_ip_val.dhcp_enabled = in->body.kvp_ip_val.dhcp_enabled; out->kvp_ip_val.addr_family = in->body.kvp_ip_val.addr_family; } return 0; } static void process_ib_ipinfo(void *in_msg, void *out_msg, int op) { struct hv_kvp_ip_msg *in = in_msg; struct hv_kvp_msg *out = out_msg; switch (op) { case KVP_OP_SET_IP_INFO: /* * Transform all parameters into utf8 encoding. */ utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.ip_addr, MAX_IP_ADDR_SIZE, UTF16_LITTLE_ENDIAN, (__u8 *)out->body.kvp_ip_val.ip_addr, MAX_IP_ADDR_SIZE); utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.sub_net, MAX_IP_ADDR_SIZE, UTF16_LITTLE_ENDIAN, (__u8 *)out->body.kvp_ip_val.sub_net, MAX_IP_ADDR_SIZE); utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.gate_way, MAX_GATEWAY_SIZE, UTF16_LITTLE_ENDIAN, (__u8 *)out->body.kvp_ip_val.gate_way, MAX_GATEWAY_SIZE); utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.dns_addr, MAX_IP_ADDR_SIZE, UTF16_LITTLE_ENDIAN, (__u8 *)out->body.kvp_ip_val.dns_addr, MAX_IP_ADDR_SIZE); out->body.kvp_ip_val.dhcp_enabled = in->kvp_ip_val.dhcp_enabled; default: utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.adapter_id, MAX_ADAPTER_ID_SIZE, UTF16_LITTLE_ENDIAN, (__u8 *)out->body.kvp_ip_val.adapter_id, MAX_ADAPTER_ID_SIZE); out->body.kvp_ip_val.addr_family = in->kvp_ip_val.addr_family; } } static void kvp_send_key(struct work_struct *dummy) { struct hv_kvp_msg *message; struct hv_kvp_msg *in_msg; __u8 operation = kvp_transaction.kvp_msg->kvp_hdr.operation; __u8 pool = kvp_transaction.kvp_msg->kvp_hdr.pool; __u32 val32; __u64 val64; int rc; /* The transaction state is wrong. */ if (kvp_transaction.state != HVUTIL_HOSTMSG_RECEIVED) return; message = kzalloc(sizeof(*message), GFP_KERNEL); if (!message) return; message->kvp_hdr.operation = operation; message->kvp_hdr.pool = pool; in_msg = kvp_transaction.kvp_msg; /* * The key/value strings sent from the host are encoded in * in utf16; convert it to utf8 strings. * The host assures us that the utf16 strings will not exceed * the max lengths specified. We will however, reserve room * for the string terminating character - in the utf16s_utf8s() * function we limit the size of the buffer where the converted * string is placed to HV_KVP_EXCHANGE_MAX_*_SIZE -1 to guarantee * that the strings can be properly terminated! */ switch (message->kvp_hdr.operation) { case KVP_OP_SET_IP_INFO: process_ib_ipinfo(in_msg, message, KVP_OP_SET_IP_INFO); break; case KVP_OP_GET_IP_INFO: process_ib_ipinfo(in_msg, message, KVP_OP_GET_IP_INFO); break; case KVP_OP_SET: switch (in_msg->body.kvp_set.data.value_type) { case REG_SZ: /* * The value is a string - utf16 encoding. */ message->body.kvp_set.data.value_size = utf16s_to_utf8s( (wchar_t *)in_msg->body.kvp_set.data.value, in_msg->body.kvp_set.data.value_size, UTF16_LITTLE_ENDIAN, message->body.kvp_set.data.value, HV_KVP_EXCHANGE_MAX_VALUE_SIZE - 1) + 1; break; case REG_U32: /* * The value is a 32 bit scalar. * We save this as a utf8 string. */ val32 = in_msg->body.kvp_set.data.value_u32; message->body.kvp_set.data.value_size = sprintf(message->body.kvp_set.data.value, "%d", val32) + 1; break; case REG_U64: /* * The value is a 64 bit scalar. * We save this as a utf8 string. */ val64 = in_msg->body.kvp_set.data.value_u64; message->body.kvp_set.data.value_size = sprintf(message->body.kvp_set.data.value, "%llu", val64) + 1; break; } case KVP_OP_GET: message->body.kvp_set.data.key_size = utf16s_to_utf8s( (wchar_t *)in_msg->body.kvp_set.data.key, in_msg->body.kvp_set.data.key_size, UTF16_LITTLE_ENDIAN, message->body.kvp_set.data.key, HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1; break; case KVP_OP_DELETE: message->body.kvp_delete.key_size = utf16s_to_utf8s( (wchar_t *)in_msg->body.kvp_delete.key, in_msg->body.kvp_delete.key_size, UTF16_LITTLE_ENDIAN, message->body.kvp_delete.key, HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1; break; case KVP_OP_ENUMERATE: message->body.kvp_enum_data.index = in_msg->body.kvp_enum_data.index; break; } kvp_transaction.state = HVUTIL_USERSPACE_REQ; rc = hvutil_transport_send(hvt, message, sizeof(*message), NULL); if (rc) { pr_debug("KVP: failed to communicate to the daemon: %d\n", rc); if (cancel_delayed_work_sync(&kvp_timeout_work)) { kvp_respond_to_host(message, HV_E_FAIL); kvp_transaction.state = HVUTIL_READY; } } kfree(message); } /* * Send a response back to the host. */ static void kvp_respond_to_host(struct hv_kvp_msg *msg_to_host, int error) { struct hv_kvp_msg *kvp_msg; struct hv_kvp_exchg_msg_value *kvp_data; char *key_name; char *value; struct icmsg_hdr *icmsghdrp; int keylen = 0; int valuelen = 0; u32 buf_len; struct vmbus_channel *channel; u64 req_id; int ret; /* * Copy the global state for completing the transaction. Note that * only one transaction can be active at a time. */ buf_len = kvp_transaction.recv_len; channel = kvp_transaction.recv_channel; req_id = kvp_transaction.recv_req_id; icmsghdrp = (struct icmsg_hdr *) &recv_buffer[sizeof(struct vmbuspipe_hdr)]; if (channel->onchannel_callback == NULL) /* * We have raced with util driver being unloaded; * silently return. */ return; icmsghdrp->status = error; /* * If the error parameter is set, terminate the host's enumeration * on this pool. */ if (error) { /* * Something failed or we have timed out; * terminate the current host-side iteration. */ goto response_done; } kvp_msg = (struct hv_kvp_msg *) &recv_buffer[sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr)]; switch (kvp_transaction.kvp_msg->kvp_hdr.operation) { case KVP_OP_GET_IP_INFO: ret = process_ob_ipinfo(msg_to_host, (struct hv_kvp_ip_msg *)kvp_msg, KVP_OP_GET_IP_INFO); if (ret < 0) icmsghdrp->status = HV_E_FAIL; goto response_done; case KVP_OP_SET_IP_INFO: goto response_done; case KVP_OP_GET: kvp_data = &kvp_msg->body.kvp_get.data; goto copy_value; case KVP_OP_SET: case KVP_OP_DELETE: goto response_done; default: break; } kvp_data = &kvp_msg->body.kvp_enum_data.data; key_name = msg_to_host->body.kvp_enum_data.data.key; /* * The windows host expects the key/value pair to be encoded * in utf16. Ensure that the key/value size reported to the host * will be less than or equal to the MAX size (including the * terminating character). */ keylen = utf8s_to_utf16s(key_name, strlen(key_name), UTF16_HOST_ENDIAN, (wchar_t *) kvp_data->key, (HV_KVP_EXCHANGE_MAX_KEY_SIZE / 2) - 2); kvp_data->key_size = 2*(keylen + 1); /* utf16 encoding */ copy_value: value = msg_to_host->body.kvp_enum_data.data.value; valuelen = utf8s_to_utf16s(value, strlen(value), UTF16_HOST_ENDIAN, (wchar_t *) kvp_data->value, (HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2) - 2); kvp_data->value_size = 2*(valuelen + 1); /* utf16 encoding */ /* * If the utf8s to utf16s conversion failed; notify host * of the error. */ if ((keylen < 0) || (valuelen < 0)) icmsghdrp->status = HV_E_FAIL; kvp_data->value_type = REG_SZ; /* all our values are strings */ response_done: icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, VM_PKT_DATA_INBAND, 0); } /* * This callback is invoked when we get a KVP message from the host. * The host ensures that only one KVP transaction can be active at a time. * KVP implementation in Linux needs to forward the key to a user-mde * component to retrieve the corresponding value. Consequently, we cannot * respond to the host in the context of this callback. Since the host * guarantees that at most only one transaction can be active at a time, * we stash away the transaction state in a set of global variables. */ void hv_kvp_onchannelcallback(void *context) { struct vmbus_channel *channel = context; u32 recvlen; u64 requestid; struct hv_kvp_msg *kvp_msg; struct icmsg_hdr *icmsghdrp; int kvp_srv_version; static enum {NEGO_NOT_STARTED, NEGO_IN_PROGRESS, NEGO_FINISHED} host_negotiatied = NEGO_NOT_STARTED; if (kvp_transaction.state < HVUTIL_READY) { /* * If userspace daemon is not connected and host is asking * us to negotiate we need to delay to not lose messages. * This is important for Failover IP setting. */ if (host_negotiatied == NEGO_NOT_STARTED) { host_negotiatied = NEGO_IN_PROGRESS; schedule_delayed_work(&kvp_host_handshake_work, HV_UTIL_NEGO_TIMEOUT * HZ); } return; } if (kvp_transaction.state > HVUTIL_READY) return; vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 4, &recvlen, &requestid); if (recvlen > 0) { icmsghdrp = (struct icmsg_hdr *)&recv_buffer[ sizeof(struct vmbuspipe_hdr)]; if (icmsghdrp->icmsgtype == ICMSGTYPE_NEGOTIATE) { if (vmbus_prep_negotiate_resp(icmsghdrp, recv_buffer, fw_versions, FW_VER_COUNT, kvp_versions, KVP_VER_COUNT, NULL, &kvp_srv_version)) { pr_info("KVP IC version %d.%d\n", kvp_srv_version >> 16, kvp_srv_version & 0xFFFF); } } else { kvp_msg = (struct hv_kvp_msg *)&recv_buffer[ sizeof(struct vmbuspipe_hdr) + sizeof(struct icmsg_hdr)]; /* * Stash away this global state for completing the * transaction; note transactions are serialized. */ kvp_transaction.recv_len = recvlen; kvp_transaction.recv_req_id = requestid; kvp_transaction.kvp_msg = kvp_msg; if (kvp_transaction.state < HVUTIL_READY) { /* Userspace is not registered yet */ kvp_respond_to_host(NULL, HV_E_FAIL); return; } kvp_transaction.state = HVUTIL_HOSTMSG_RECEIVED; /* * Get the information from the * user-mode component. * component. This transaction will be * completed when we get the value from * the user-mode component. * Set a timeout to deal with * user-mode not responding. */ schedule_work(&kvp_sendkey_work); schedule_delayed_work(&kvp_timeout_work, HV_UTIL_TIMEOUT * HZ); return; } icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; vmbus_sendpacket(channel, recv_buffer, recvlen, requestid, VM_PKT_DATA_INBAND, 0); host_negotiatied = NEGO_FINISHED; hv_poll_channel(kvp_transaction.recv_channel, kvp_poll_wrapper); } } static void kvp_on_reset(void) { if (cancel_delayed_work_sync(&kvp_timeout_work)) kvp_respond_to_host(NULL, HV_E_FAIL); kvp_transaction.state = HVUTIL_DEVICE_INIT; } int hv_kvp_init(struct hv_util_service *srv) { recv_buffer = srv->recv_buffer; kvp_transaction.recv_channel = srv->channel; /* * When this driver loads, the user level daemon that * processes the host requests may not yet be running. * Defer processing channel callbacks until the daemon * has registered. */ kvp_transaction.state = HVUTIL_DEVICE_INIT; hvt = hvutil_transport_init(kvp_devname, CN_KVP_IDX, CN_KVP_VAL, kvp_on_msg, kvp_on_reset); if (!hvt) return -EFAULT; return 0; } void hv_kvp_deinit(void) { kvp_transaction.state = HVUTIL_DEVICE_DYING; cancel_delayed_work_sync(&kvp_host_handshake_work); cancel_delayed_work_sync(&kvp_timeout_work); cancel_work_sync(&kvp_sendkey_work); hvutil_transport_destroy(hvt); } |